Gold
Get 3 kills without dying 5 times with the .50 GS. |
Platinum
Get 15 longshot kills with the .50 GS. |
Polyatomic
Get 20 headshot kills with the .50 GS. |
Orion
Unlock Polyatomic for this weapon and 50 other weapons. |
Modern Warfare II Bot Lobbies & Weapon Boosting